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7d3e64ef5e
Inherit NCollection_Buffer from Standard_Transient, do not use incomplete NCollection_Handle. OpenGl_Context, add methods ActiveProgram(),BindProgram() to manage currently active GLSL program. Add method ::ToUseVbo(). OpenGl_ShaderProgram, setup locations of pre-defined vertex attributes occVertex, occNormal, occTexCoord, occColor before linkage. Remove methods OpenGl_ShaderProgram::Bind(), ::BindWithVariables() and ::Unbind() - OpenGl_Context::BindProgram() should be used instead. Introduce class OpenGl_VertexBufferCompat, which emulates VBO behavior on systems without VBO (compatibility with broken OpenGL drivers on Windows). OpenGl_PrimitiveArray - use OpenGl_VertexBufferCompat when VBO is unavailable, remove duplicated code. Use OpenGl_VertexBuffer::HasNormalAttribute() method to activate lighting. OpenGl_Text - use OpenGl_VertexBufferCompat, eliminate duplicated code. Changes in OpenGl_VertexBuffer, drop methods BindFixed()/UnbindFixed(). Superseded by new methods BindAllAttributes()/UnbindAllAttributes() which handle active GLSL program, when it is set.
140 lines
3.2 KiB
C++
140 lines
3.2 KiB
C++
// Created on: 2014-04-01
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// Created by: Kirill Gavrilov
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// Copyright (c) 2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _NCollection_Buffer_HeaderFile
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#define _NCollection_Buffer_HeaderFile
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#include <NCollection_BaseAllocator.hxx>
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#include <Standard_Transient.hxx>
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//! Low-level buffer object.
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class NCollection_Buffer : public Standard_Transient
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{
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public:
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//! Default constructor.
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//! When theData is NULL but theSize is not 0 than buffer of specified size will be allocated.
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//! @param theAlloc memory allocator
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//! @param theSize buffer size
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//! @param theData buffer data allocated by theAlloc
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NCollection_Buffer (const Handle(NCollection_BaseAllocator)& theAlloc,
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const Standard_Size theSize = 0,
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Standard_Byte* theData = NULL)
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: myData (NULL),
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mySize (0),
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myAllocator (theAlloc)
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{
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if (theData != NULL)
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{
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myData = theData;
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mySize = theSize;
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}
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else
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{
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Allocate (theSize);
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}
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}
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//! Destructor.
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~NCollection_Buffer()
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{
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Free();
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}
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//! @return buffer data
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const Standard_Byte* Data() const
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{
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return myData;
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}
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//! @return buffer data
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Standard_Byte* ChangeData()
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{
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return myData;
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}
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//! @return true if buffer is not allocated
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bool IsEmpty() const
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{
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return myData == NULL;
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}
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//! Return buffer length in bytes.
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Standard_Size Size() const
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{
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return mySize;
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}
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//! @return buffer allocator
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const Handle(NCollection_BaseAllocator)& Allocator() const
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{
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return myAllocator;
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}
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//! Assign new buffer allocator with de-allocation of buffer.
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void SetAllocator (const Handle(NCollection_BaseAllocator)& theAlloc)
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{
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Free();
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myAllocator = theAlloc;
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}
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//! Allocate the buffer.
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//! @param theSize buffer length in bytes
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bool Allocate (const Standard_Size theSize)
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{
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Free();
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mySize = theSize;
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if (theSize != 0
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|| !myAllocator.IsNull())
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{
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myData = (Standard_Byte* )myAllocator->Allocate (theSize);
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}
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if (myData == NULL)
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{
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mySize = 0;
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return false;
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}
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return true;
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}
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//! De-allocate buffer.
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void Free()
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{
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if (!myAllocator.IsNull())
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{
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myAllocator->Free (myData);
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}
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myData = NULL;
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mySize = 0;
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}
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protected:
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Standard_Byte* myData; //!< data pointer
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Standard_Size mySize; //!< buffer length in bytes
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Handle(NCollection_BaseAllocator) myAllocator; //!< buffer allocator
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public:
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DEFINE_STANDARD_RTTI(NCollection_Buffer) // Type definition
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};
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DEFINE_STANDARD_HANDLE(NCollection_Buffer, Standard_Transient)
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#endif // _NCollection_Buffer_HeaderFile
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